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Anuta_ua [19.1K]
3 years ago
13

How is sigma notation used to evaluate a series?

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
3 0
The sigma indicates sum.
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Can someone please help
Sliva [168]

Answer:

i got no clue

Step-by-step explanation:

ignc

4 0
2 years ago
A shirt has an original price of $19.75. If the shirt is marked 25% off and there is a 7.75% tax, how
Bumek [7]

Answer: 4.90 im not 100 percent sure

Step-by-step explanation:

To find the actual discount, multiply the discount rate by the original amount 'x'. To find the sale price, subtract the actual discount from the original amount 'x' and equate this to given sale price.

4 0
2 years ago
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there are 341 pine trees and spruce trees in woodlot. 122 trees were pine. what fraction of the trees were spruce?​
Olenka [21]

Answer:

219 over 1000

Step-by-step explanation:

3 0
3 years ago
△ABC is a right isosceles triangle, the centers of two arcs are the midpoint of AB
mel-nik [20]

Answer:

  0

Step-by-step explanation:

Let's define 3 areas:

  • S = area of semicircle with radius 6 in (diameter AB)
  • T = area of quarter circle with radius 6√2 in (radius AC)
  • U = area of triangle ABC (side lengths 6√2)

The white space between the "moon" and the triangle has area ...

  white = T - U

Then the area of the "moon" shape is ...

  moon = S -white = S -(T -U) = S -T +U

The area we're asked to find is ...

  moon - triangle = (S -T +U) -U = S -T

__

The formula for the area of a circle of radius r is ...

  A = πr²

So, ...

  S = (1/2)π(6 in)² = 18π in²

and

  T = (1/4)π(6√2 in)² = 18π in²

The difference in areas is S -T = (18π in²) -(18π in²) = 0.

There is no difference between the areas of the "moon" and the triangle.

4 0
3 years ago
True or false? An obtuse triangle cannot be similar to an acute triangle.
daser333 [38]

Answer:

True

Step-by-step explanation:

an obtuse triangle is a big one, an acute triangle is a small one. They are both triangles, but they are not similar besides that

3 0
3 years ago
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